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Lucara Diamond

LUC.ST
54
Other Precious Metals · Basic Materials
Exchange
Stockholm Stock Exchange
Winston Score
54
Winston is curious
Mixed quality — meaningful strengths and weaknesses.
Data as of Aug 23, 2026 · filings through Jun 30, 2026
How the score breaks down
Quality
Good
Growth
Weak
Cash Flow
Good
Stability
Good
Valuation
Exceptional

Winston Score History

The full picture

Lucara Diamond Corp. is a diamond mining company that digs up rough diamonds from the ground and sells them to buyers in the diamond industry. Its main asset is the Karowe mine in Botswana, Africa, which is famous for producing some of the largest gem-quality diamonds ever found, including the 1,109-carat Lesedi La Rona. The company focuses on large, high-value stones rather than high volumes of smaller diamonds.

Lucara makes money by selling rough diamonds directly to cutters, polishers, and jewelry manufacturers. It has an unusual sales arrangement called Clara, a digital platform that matches individual rough diamonds to specific buyers using data and AI, which helps it get better prices than traditional auctions. The company operates almost entirely from the single Karowe mine, which keeps costs focused but also concentrates its risk in one location. The key risk is that diamond prices can fall sharply, and the company depends heavily on finding large, exceptional stones to maintain its margins.

Score breakdown

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Quality

Profit per sale
Gross Margin
51.6%
Healthy — 51.6% gross margin
Profit after running costs
Operating Margin
42.9%
Excellent — 42.9% operating margin
Return on the money invested
ROCE
2.8%
Weak — 2.8% return on capital

ROIC between 0% and 5%. They earn a few cents back per dollar invested in the business.

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Growth

Sales growth
Sales YoY
-24.8%
Shrinking sales (-24.8% YoY)
Profit growth
EPS YoY
-72.1%
Earnings shrinking (-72.1% YoY)

Earnings per share down more than 10%. Either a bad year, or a real decline.

How steady the profit is
EPS Consistency
4/8 quarters
Earnings inconsistent quarter-to-quarter

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Cash Flow

Profit that turns into cash
Cash Conversion
259%
Turns 259% of profit into real cash
Spare cash per sale
FCF Margin
-222.3%
Burning cash (-222.3%)

Free cash flow is negative. They are burning cash, not generating it.

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Stability

What it owes vs what it owns
Debt / Equity
0.81
Moderate — manageable debt (0.81)
Covers its interest
Interest Cover
6.32x
Adequate interest coverage (6.3x)

Interest coverage between 3 and 8. Profits cover interest several times over.

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Valuation

Price vs profit
P/E Ratio (TTM)
3.8x
no trend
Attractive valuation — P/E 3.8

P/E under 10. The price tag is small relative to last year's profit.

Cheaper or dearer next year
P/E vs Forward
+3.0
GROWING
Earnings expected to grow meaningfully — cheaper on forward P/E (3.8 → 0.8)

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Dividends

Not applicable for this business.
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